基于嵌套型优势关系粗糙集与模糊理论的岩质边坡施工安全性评价  

Safety evaluation of rock slope construction based on nested dominance relation rough set and fuzzy theory

作　　者：刘舒逸 陈建宏[2] LIU Shuyi;CHEN Jianhong(School of Mathematics and Statistics,Central South University,Changsha 410083,China;School of Resources and Safety Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学数学与统计学院,湖南长沙410083 [2]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《铁道科学与工程学报》2023年第12期4571-4581,共11页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(52274163)。

摘　　要：为降低工程建设风险、解决岩质边坡施工安全性评价方法复杂等问题,对基于嵌套型优势关系粗糙集与模糊理论的岩质边坡施工安全性评价方法展开研究。首先,对岩质边坡施工安全性影响因素进行分析,通过文献研究及专家调查将岩质边坡施工安全性影响因素归为勘察设计风险、施工风险、工程地质风险及自然环境风险四大类,包含勘察资料准确性、边坡形式、支护结构及设计参数等19个2级影响因素指标,并针对定量指标构造了三相性隶属函数;其次,介绍了权重确定及指标分级模糊评价的具体方法;再次,阐述了建立评价决策表、数据离散、多级属性约简及偏好规则的生成等操作流程;最后,对15个比较有代表性的边坡进行实例研究,验证了该方法的可靠性。通过实践证明,基于嵌套型优势关系粗糙集与模糊理论的风险评价分析方法可行,可以为岩质边坡施工安全性风险评价与规律分析提供一种新思路。结果表明:嵌套型优势关系粗糙集理论对岩质边坡施工安全性风险的各级指标属性自上而下进行了约简,降低了原有系统的复杂性,同时考虑了指标中含有的偏好信息,考虑综合全面,规则分析可信度高;样本集数量和约简的选取对基于嵌套型优势关系粗糙集与模糊理论进行评价决策时影响较大,样本集越大生成的规则可信度越高,正确选取约简偏好规则生成就越合理。In order to reduce the risk of engineering construction and solve the problems of complex evaluation methods of rock slope construction safety,this paper studied the evaluation method of rock slope construction safety based on nested dominance rough set and fuzzy theory.First of all,the impact factors of rock slope construction safety were analyzed.Through literature research and expert investigation,the impact factors of rock slope construction safety were classified into four categories:survey and design risk,construction risk,engineering geological risk,and natural environment risk,including 19 secondary impact factor indicators such as survey data accuracy,slope form,support structure,and design parameters.The three-phase membership function was constructed according to the quantitative index;Second,it introduced the specific methods of weight determination and index grading fuzzy evaluation;Third,the operation flow of establishing evaluation decision table,data discretization,multi-level attribute reduction,and generation of preference rules were described;Finally,the reliability of the method was verified by a case study of fifteen representative slopes.It was proved by practice that the risk assessment and analysis method based on nested dominance rough set and fuzzy theory is feasible,which can provide a new idea for risk assessment and law analysis of slope stability.The nested dominance relation rough set theory reduces the attributes of all levels of indicators of slope stability risk from top to bottom,reduces the complexity of the original system,and takes into account the preference information contained in the indicators,which is comprehensive and has high reliability of rule analysis.The number of sample sets and the selection of reduction have a great impact on the evaluation and decision-making based on the nested dominance relationship rough set and fuzzy theory.The larger the sample set,the higher the credibility of the rules generated,and the more reasonable the correct selection of reduction

关 键 词：模糊理论 嵌套优势关系 粗糙集 岩质边坡 施工安全评价 

分 类 号：X947[环境科学与工程—安全科学]